FR2256902A1 - Waste water and sewage treatment - with dissolved oxygen and activated sludge by an ejector - Google Patents

Waste water and sewage treatment - with dissolved oxygen and activated sludge by an ejector

Info

Publication number
FR2256902A1
FR2256902A1 FR7500170A FR7500170A FR2256902A1 FR 2256902 A1 FR2256902 A1 FR 2256902A1 FR 7500170 A FR7500170 A FR 7500170A FR 7500170 A FR7500170 A FR 7500170A FR 2256902 A1 FR2256902 A1 FR 2256902A1
Authority
FR
France
Prior art keywords
sludge
activated sludge
oxygen
gas
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7500170A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19742400416 external-priority patent/DE2400416C3/en
Application filed by BASF SE filed Critical BASF SE
Publication of FR2256902A1 publication Critical patent/FR2256902A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1294—"Venturi" aeration means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B01F25/211—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers the injectors being surrounded by guiding tubes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Activated Sludge Processes (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

Waste water and sewage, contg. biodegradable impurities, are treated in >=1 enclosures with dissolved oxygen and activated sludge. The contact between these three reacting materials is intensified by increasing the number of interfaces and by shortening the diffusion paths in the sludge floccules. Injectors are used to this effect with a liq. nozzle an annular, concentric nozzle for the gas and an impulse exchange tube. The jet of liq. leaves the nozzle at a speed of 29m/sec. and sets up a shear gradient in the activated sludge; the air bubbles are finely divided and at the same time the sludge is sucked into the zone of the jet and is intensely mixed in the tube. The sludge leaving the latter is satd. with oxygen and the gas it contains causes it to rise in the form of a bubbling column to the surface of the activated sludge, giving up its oxygen proportionally to the depth of immersion of the injector and the oxygen content of the gas. The quantity of sludge which can be treated per unit of vol. of a biological settlement plant per day can be increased by 100% as compared with known processes.
FR7500170A 1974-01-05 1975-01-03 Waste water and sewage treatment - with dissolved oxygen and activated sludge by an ejector Withdrawn FR2256902A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742400416 DE2400416C3 (en) 1974-01-05 Process for treating waste water

Publications (1)

Publication Number Publication Date
FR2256902A1 true FR2256902A1 (en) 1975-08-01

Family

ID=5904197

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7500170A Withdrawn FR2256902A1 (en) 1974-01-05 1975-01-03 Waste water and sewage treatment - with dissolved oxygen and activated sludge by an ejector

Country Status (6)

Country Link
JP (1) JPS5098158A (en)
AT (1) ATA3875A (en)
BE (1) BE824072A (en)
DK (1) DK682774A (en)
FR (1) FR2256902A1 (en)
NL (1) NL7417053A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520024A1 (en) * 1982-01-14 1983-07-22 Kharchenko Mikhail Outlet vent for dam - comprises air ducts supplying mixing chamber in which water is oxygenated
EP0801989A1 (en) * 1996-04-17 1997-10-22 Voith Sulzer Stoffaufbereitung GmbH Flotation method and mixing device for carrying it out

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7178082B2 (en) * 2018-10-19 2022-11-25 アクアインテック株式会社 Stirring tank

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520024A1 (en) * 1982-01-14 1983-07-22 Kharchenko Mikhail Outlet vent for dam - comprises air ducts supplying mixing chamber in which water is oxygenated
EP0801989A1 (en) * 1996-04-17 1997-10-22 Voith Sulzer Stoffaufbereitung GmbH Flotation method and mixing device for carrying it out
US6129212A (en) * 1996-04-17 2000-10-10 Voith Sulzer Stoffaufbereitung Gmbh Flotation process and mixing device

Also Published As

Publication number Publication date
DE2400416B2 (en) 1976-06-10
JPS5098158A (en) 1975-08-04
DE2400416A1 (en) 1975-07-24
DK682774A (en) 1975-09-08
NL7417053A (en) 1975-07-08
BE824072A (en) 1975-07-03
ATA3875A (en) 1976-10-15

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Legal Events

Date Code Title Description
RE Withdrawal of published application